Pressure Convertor

The pressure calculator converts pressure measurements between different pressure units.

There is also a table showing the conversion factors used in this calculator which dynmaically converts pressurce measurements to all defined measurement units.

Selecting a unit from the "Convert from" dropdown list displays a brief description of the measurement unit.

Pressure Converter

Value	Convert from	Convert to	Value
	Atmosphere, standard Atmosphere, technical Bar Mercury (in Hg) Mercury (mm Hg) Pascal PSI Torr Water	Atmosphere, standard Atmosphere, technical Bar Mercury (in Hg) Mercury (mm Hg) Pascal PSI Torr Water
Standard Atmosphere (atm) = typical air pressure at sea level

You can refine the calculations by controlling the number of decimal places that the calculator calculates to. The default is 2 decimal places.

0 1 2 3 4 5 6 7 8 9 Decimal Places

Conversion Factors

Convert to
Convert from	Atmosphere		Bar	Mercury (in Hg)	Mercury (mm Hg)	Pascal	PSI	Torr	Water
	Normal	Technical
Atmosphere, standard	1.00	1.03	1.01	29.92	760.00	101325.00	14.70	760.00	406.79
Atmosphere, technical	0.97	1.00	0.98	28.96	735.56	98066.50	14.22	735.56	393.71
Bar	0.99	1.02	1.00	29.53	750.06	100000.00	14.50	750.06	401.47
Mercury (in Hg)	0.03	0.03	0.03	1.00	25.40	3386.38	0.49	25.40	13.60
Mercury (mm Hg)	0.00	0.00	0.00	0.04	1.00	133.32	0.02	1.00	0.54
Pascal	0.00	0.00	0.00	0.00	0.01	1.00	0.00	0.01	0.00
PSI	0.07	0.07	0.07	2.04	51.72	6894.76	1.00	51.72	27.68
Torr	0.00	0.00	0.00	0.04	1.00	133.32	0.02	1.00	0.54
Water	0.00	0.00	0.00	0.07	1.87	24.908	0.04	1.87	1.00

The pressure convertor calculates pressure using the following conversion factors:

1 standard atmosphere = 1.013250 x 10⁵ Pascals

1 technical atmosphere = 9.806650 x 10⁴ Pascals

1 Bar = 1 x 10⁵ Pascals

1 Mercury (in Hg) = 3.38638 x 10³ Pascals

1 Mercury (mm Hg) = 1.33322 x 10² Pascals

1 PSI = 6.894757 x 10³ Pascals

1 Torr = 1.33322 x 10² Pascals

1 Inches of Water (in H2O) = 2.49082 x 10² Pascals